This glossary defines terms used in this manual.
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C
A character that forces all following text to the left margin
of the next line or that signals the end of user input.
The Return key is
usually used to produce a carriage return.
The carriage return character is the
default record separator for record-oriented programs such as
awk.
In the Revision Control System (RCS), to store a file or revision in the RCS library.
In the Revision Control System (RCS), to retrieve a file or revision from the RCS library.
In a regular expression, a name that defines a particular subset of the available characters, such as lowercase characters, in a collating sequence that uses multicharacter strings to represent single characters.
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D
In a Revision Control System (RCS) or Source Code Control System (SCCS) file, the set of changes that constitute a specific version of the file.
See dependent
In the
make
utility, a line in the description file that describes the dependents
on which a given target depends.
Also called a
dependency file.
In the
make
utility, an entity on which a file to be built (the
target)
depends.
A source file is a dependent of an object module.
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F
In
awk,
one element of an input record; fields are separated by a field
separator, which can be specified and is by default any amount of white
space.
The beginning and end of the record are also field separators.
See also record
In
awk,
a variable that is a field of the input record; field variables can be
manipulated as any other variable.
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G
In the Source Code Control System (SCCS), the file whose contents are used to create the s-file or to apply a delta to it.
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I
In the Source Code Control System (SCCS), a symbol composed of a single
letter enclosed by percent signs
( % ).
In the Revision Control System (RCS), a symbol composed of a keyword
name enclosed by dollar signs
( $ ).
In expanded form, a keyword provides identification information about
the file, such as its date, version number, or name.
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L
A program or program fragment for analyzing input and assigning
elements of it to categories to assist in parsing the input.
The
lex
program assists in the creation of lexical analyzers.
See also parser
In a version control system, the creation and use of information flagging a version control file as being checked out for editing.
In a version control system, a way to prevent overlapping and concurrent changes to a file. SCCS uses p-files to indicate which files are currently out for editing; RCS creates locks by editing the RCS file to insert lock information.
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M
For the
m4
macro processor or the
make
utility, a statement creating a macro name and defining the text and
argument substitutions for which the macro stands.
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O
In regular expressions, a character that is interpreted to mean
something other than its literal meaning.
For example, a pair of
brackets
( [ ] )
form an operator that enables a single-character match on any one of
the characters enclosed by the brackets.
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P
In the Source Code Control System (SCCS), a lock file whose presence indicates that the s-file of the same name is currently being edited.
A program or program fragment for interpreting input and determining
how to act upon it.
The
yacc
program assists in the creation of parsers.
In the
sed
editor, the range of lines currently being edited; the pattern space is
selected by an address or pair of addresses.
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R
In the Revision Control System (RCS), a file stored in the RCS library, containing the text of the original file and the list of deltas that have been applied to it.
A set of programs for managing program and documentation source files so that any revision of a given file can be retrieved. Revisions to a file are stored as a series of incremental changes (deltas) applied to the original version instead of as complete copies of all the versions. The system provides locking mechanisms so that only a single user can apply changes to a given file at any one time.
See also SCCS (Source Code Control System)
A file stored in the Revision Control System (RCS) library containing the text of the original file and the list of deltas that have been applied to it.
The directory in which Revision Control System (RCS) files are stored.
In
awk,
the information between two consecutive occurrences of the record
separator, which can be specified and is by default a newline
character.
For most purposes, a record can be thought of as a line
from the input file.
The beginning and end of the file are also
record separators.
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S
In the Source Code Control System (SCCS), a file stored in the SCCS library, containing the text of the original file and the list of deltas that have been applied to it.
A set of programs for managing program and documentation source files so that any revision of a given file can be retrieved. Revisions to a file are stored as a series of incremental changes (deltas) applied to the original version instead of as complete copies of all the versions. The system provides locking mechanisms so that only a single user can apply changes to a given file at any one time.
See also RCS (Revision Control System)
The directory in which Source Code Control System (SCCS) s-files and p-files are stored.
In the
sed
editor, a list of editing commands to be applied to the input file.
In SCCS, the numeric identification applied to a particular delta.
See also SCCS (Source Code Control System)
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T
Also called a
target file.
In the
make
utility, an entity to be built from its
dependents.
An executable program is a target that is built from one or more object
modules.
For the
m4
macro processor, a recognizable entity that can be a macro name.
A
token consists of alphanumeric characters delimited by nonalphanumeric
characters and cannot contain other tokens.
For
lex-generated
lexical analyzers and
yacc-generated
parsers, the smallest independent unit of meaning as defined by either
the parser or the lexical analyzer.
A token can contain data, a
language keyword, an identifier, or other parts of a language syntax.
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V
In a version control system, a file that consists of original text and a set of revisions (deltas) that have been made to it. In the Revision Control System (RCS), this file is called an RCS-file; in the Source Code Control System (SCCS), an s-file.
A directory that contains files that are organized and maintained under a version control system such as the Revision Control System (RCS) or the Source Code Control System (SCCS).
A software tool that aids in the organization and maintenance of file revisions and configurations. In particular, it automates the storing, logging, retrieval, and identification of revisions to source programs, documentation, and data files.
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Y
For the
make
utility, a dependency file that has changed more recently than its
target.